AcWing 793. 高精度乘法
原题链接
简单
作者:
Dylan17
,
2019-09-27 20:36:03
,
所有人可见
,
阅读 796
#include <iostream>
#include <vector>
using namespace std;
vector<int> mul(vector<int> &A, int b) {
vector<int> C;
int t = 0;
for (int i = 0; i < A.size() || t; i++) {
if (i < A.size()) t += A[i] * b;
C.push_back(t % 10);
t /= 10;
}
return C;
}
int main() {
string a;
int b;
cin >> a >> b;
vector<int> A;
for (int i = a.size() - 1; i >= 0; i--) A.push_back(a[i] - '0');
auto C = mul(A, b);
for (int i = C.size() - 1; i >= 0; i--) printf("%d", C[i]);
return 0;
}